Guide to Electrical Wiring Colours
As an electrician in training, the electrical wiring colours are one of the first and most fundamental lessons you’ll learn. This post teaches you everything you need to know about the wiring colours, including the new system, the old system, and single- vs three-phase wiring
Wiring Colours Explained
Before we dive into learning about the colours of the wires themselves, it’s important to understand why we have three different types of wire and the role that each of them plays in the circuit.
The earth wire is a safety feature in electrical wiring systems. It stops you from getting an electric shock by providing a path for the current to flow to the ground (or earth, hence the name). At the same time, the earth wire prevents current from flowing through the faulty circuit by breaking the fuse or circuit breaker.
The live wire carries current towards your appliances from the power supply.
The neutral wire carries current away from your appliances and back to the power supply.
What Are the New Wiring Colours?
As you can see in the image below, the new (current) wiring colours in are:
Earth wire → green and yellow
Live wire → brown
Neutral wire → blue
What Are the Old Wiring Colours?
The old wiring colours still have three wires: earth, live, and neutral. However, in older wiring systems, you’ll find that the colours of these wires are different:
Earth wire → green and yellow (but sometimes bare with no sleeve)
Live wire → red
Neutral wire → black
Guide for Domestic Electrical Wiring System
While the construction of your house people should spend equal time as they spend while constructing the other things. The electrical connections of house is much harder than it looks. As you have to pay attention to mapping the circuits, power points, panels for your ease and the most important thing that it should be placed where the children can’t reach. The main component of wiring, is a circuit which mainly handles all the electrical appliances of the houses. Each circuit can be traced from its beginning in the service panel or subpanel through various receptacles, fixtures, and/or appliances and back. In these cases it is very important to use only that cable on which you can trust, which much more pure, durable, Heat resistant, Lead free and flame retardant.
Following are the few points for you to plan and set-up the correct wiring system for your home.
The support of electrical service should be large enough to fulfill all electrical needs of the home with keeping in mind of future additions.
There should always be proper grounding to maintain the earthing of home.
An electrical box that is properly wired, sufficient for the home’s power needs, and has not been recalled. (There have been many electrical panel recalls, both old and current.)
It is to be kept in mind to do not overload the circuits.
Wiring should be in good working condition i.e wiring should not be of aluminium and it should be of copper, knob and tube, it should not be exposed, crimped and cracked or damaged.
The outlets and switches should always be in such a manner that it can be easily used and should be placed exactly according to use.
GFCIs are in-use in moisture-prone areas, including kitchen, laundry, bath, basement, garage, crawlspaces, and outdoors.
Common homeowner electrical mistakes (wrong wire size; loose connections; missing junction boxes; exposed wires; wrong amperage circuit breaker; overloaded outlets/circuit…).
What are the major components of an electric system:
The Meter: Meter is the main unit from where the current is distributed to the whole house. The main line comes from pole and it connects the meter that’s why meter is the main and first component of electric system.The meters are mainly of mechanical display or Digital display.
The Circuits: Each bundle of wire has at least three wires within – two with plastic insulation and one bare. The black and/or red insulated wires are the “hot” wires coming directly off of the circuit breakers. The white insulated or “neutral” wire carries the current back to the electrical source at the panel. The bare copper wires the ground wire, which is the safety part of the circuit.
GFCI’s: A GFCI protects from different types of shock, and shuts off the supply of electricity and provide a safe breaker from shock and potential electrocution. The main use of GFCI are in the bathrooms, kitchens, garages and typically where water may be present.
All these points should be enough for you to consider while changing or re-installing the wiring system in your home. Prime cabs ensure a safe wiring system for all your wiring needs that would need minimal change for years to come.
The Complete Guide to Electrics in the Home Including Wiring and Circuits
This section includes links to all of our Electrical DIY how to projects that includes a wide range of subjects covering items such as wiring and circuits, switches and sockets, lighting and general domestic appliances. Browse through the below list and click on your chosen link to view the project information.
Fixed Appliances – Find out how to install and repair various fixed domestic appliances including electric cookers and showers, TV aerials and security systems
Lighting – Lighting DIY how to projects help, tips and information covering dimmer switches, bathroom, exterior and kitchen lighting, lighting circuits and related subjects
Switches and Sockets – Electrical DIY projects focusing on switches and sockets including dimmer switches, pull cord switches, wiring plugs and many other electrical DIY projects
Wiring and Circuits – DIY help and projects covering all aspects of domestic electrical wiring and circuits including junction boxes, consumer units, ring mains, radial circuits and much more
The following pages will take you through the safe use of electricity and electrical appliances, cables, wires, sockets, switches together with many forms of lights and their associated switches and circuits.
The Homeowner’s DIY Guide to Electrical Wiring
A practical, money-saving guide to home electrical wiring
Handle residential wiring projects correctly, safely, and according to the National Electrical Code (NEC). Filled with clear photos and helpful diagrams, The Homeowner’s DIY Guide to Electrical Wiring shows you how to quickly and easily navigate the portions of the NEC that pertain to residential installations.
This hands-on resource covers basic electronics and explains how electrical service progresses through your home. It describes how to install and test electrical systems and lighting, repair appliances and TVs, and upgrade to the latest innovations such as home networking, home automation, and alternate power systems. You’ll learn the procedures used by professional electricians to create the kind of quality work that will pass inspection and add value to your home.
The Homeowner’s DIY Guide to Electrical Wiring shows how to:
Protect against fire and shock hazards
Track electrical service from the point of connection to the entrance panel
Follow NEC requirements for residential projects
Work with test equipment and installation tools
Use the best techniques for quality electrical work
Design and install indoor and outdoor lighting
Maintain and repair electrically powered appliances
Fix CRT, plasma, and LCD TVs
Design a data and communications network and install coax, USB, and Ethernet cabling
Install a home automation system
Install backup and alternate power systems
Work with smart meters
What is a Wiring Diagram?
A wiring diagram is a simple visual representation of the physical connections and physical layout of an electrical system or circuit. It shows how the electrical wires are interconnected and can also show where fixtures and components may be connected to the system
When and How to Use a Wiring Diagram
Use wiring diagrams to assist in building or manufacturing the circuit or electronic device. They are also useful for making repairs. DIY enthusiasts use wiring diagrams but they are also common in home building and auto repair. For example, a home builder will want to confirm the physical location of electrical outlets and light fixtures using a wiring diagram to avoid costly mistakes and building code violations
How to Draw a Circuit Diagram
comes with pre-made wiring diagram templates. Customize hundreds of electrical symbols and quickly drop them into your wiring diagram. Special control handles around each symbol allow you to quickly resize or rotate them as necessary.
To draw a wire, simply click on the Draw Lines option on the left hand side of the drawing area. If you right click on a line, you can change the line’s color or thickness and add or remove arrowheads as necessary. Drag a symbol onto the line and it will insert itself and snap into place. Once connected, it will remain connected even if you move the wire.
If you need additional symbols, click the arrow next to the visible library to bring up a drop down menu and select More. You’ll be able to search for additional symbols and open any relevant libraries.